rejection-n; 3 Senses

Sense Number 1: the act of refusing, casting off, not accepting

Commentary: REJECTION[+action][+volitional][+decision][+refusal]
NOTE: nominalization: his rejection of the offer -> he rejected the offer
NOTE: implies an agent with the ability to make a decision

Their rejection of the treaty did not come as a surprise.
John seemed to ignore Mary's rejection of his romantic advances.
Our proposal was met with rejection by the client.

WordNet 3.0 Sense Numbers: 1, 4

Sense Number 2: a medical response of intolerance to a substance

Commentary: REJECTION[+action][-volitional][+reaction][+immunological][+intolerance]
NOTE: implies a non-volitiional reaction of the body's immune system to foreign substances.

This new medication has lowered the overall rejection rate of donor kidneys.
WHat are the odds that this organ transplant will end in rejection?
Using one's own skin during skin grafts ensures there will be no rejections.

WordNet 3.0 Sense Numbers: 3

Sense Number 3: a resulting state of being discarded, cast off

Commentary: REJECTION[+state][+resulting][+discarded][+entity] [+entity][+artifact][+document][+letter][+refusal]
NOTE: often refers to a letter of refusal, but can also refer to non-written forms

John has a pile of rejections on his desk.
Bob received three rejections in one week. (he was refused three times)
Mary tore the rejection up and threw it into the waste basket.

WordNet 3.0 Sense Numbers: 2